Sansan

Sansan was an online service allowing people living in Japan to play the board game Go with other subscribers over the internet. A local two-player version of the game is also included for play. For whatever reason, the Mega Drive version did not last very long — it is one of the rarest and most soughtafter Mega Drive games; Sega of Japan’s official archive doesn’t list it and a ROM was not dumped until February 2011.